Throughout history, we have been told the story of the "Lone Inventor", the genius who, through sheer force of will and individual brilliance, creates the future in a vacuum. This narrative is particularly potent today, where billionaires are often treated as secular saints of progress, their net worth presented as a metric of their contribution to humanity.

But what if this story is incomplete? What if the most radical advancements of the last thousand years weren't the product of isolated private pursuits, but rather the result of a complex, often unseen, web of public investment and collective knowledge?

The 3 Houses of Progress

To understand where our world comes from, we have categorized the 1,000 most important inventions and advancements into three "Houses":

1. Totally Public: Ancient shared heritage (the wheel, the alphabet) or government-led moonshots (GPS, the Internet, Nuclear Power). These are the foundations of the modern world.

2. Public Subsidized: Private initiatives that sit atop a massive base of public research or utilize public infrastructure (the Smartphone, modern Pharmaceuticals, Jet Engines).

3. Totally Private: Individual or corporate pursuits driven primarily by market forces and private capital (the Steam Engine, the Printing Press, Social Networks).

The Billionaire Question

This index allows us to ask a difficult question: Are billionaires necessary?

The popular defense of extreme wealth concentration is that billionaires are the engine of innovation. They take risks that the state won't, and their vision pulls the rest of us into the future. However, as economist Mariana Mazzucato argues, the state often takes the greatest risks, funding the "unprofitable" basic research that private capital won't touch until it's a "sure thing."

Consider the iPhone. Almost every technology that makes it "smart", GPS, touchscreens, the Internet, Siri, began as a publicly funded project (often military). Steve Jobs was a visionary designer and marketer who crossed the "Final Mile," but he didn't run the marathon.

Determinism vs. Great Men

If the "Great Men" of history didn't exist, would these things have happened anyway?

History suggests a certain determinism. When the economic and social conditions are right, inventions tend to appear simultaneously. Isaac Newton and Gottfried Leibniz both "invented" calculus at the same time. Alexander Graham Bell and Elisha Gray both filed patents for the telephone on the same day.

Innovation is a social process. Billionaires may accelerate the final refinement, but the underlying current of history is powered by the public.

Conclusion

By looking at these 1,000 items, we see a world where progress is a collective endeavor. The private sector is exceptional at making things user-friendly and profitable, but it is the public sector that historically creates the possibilities in the first place.

Whether billionaires are "necessary" is a matter of debate, but what is clear is that they are not the sole authors of our future. They are the editors.